When Tom Koehler earned his first Major League win on June 20, 2013, in San Francisco, he needed it. The right-hander entered the outing 0-5 with a 5.09 ERA. Nearly 11 months later, wins are not nearly as hard to come by as Koehler returns Saturday to the site of his first victory. One Giant Koehler did not have to face last season was Tyler Colvin, who has been swinging a hot bat.